USFWS biologist Bill Bridgeland taking measurements on a Surface Elevation Table (SET) installed last year in cooperation with USGS. SETs will allow us to detect changes in the elevation of the marsh surface in response to the marsh restoration as...

Mammals; Work of the Service; Employees (USFWS); Personnel; Monitoring; Radio telemetry

U.S. Fish and Wildlife Service biologists Mike Jimenez (left) and Ed Bangs (right) take blood samples from a tranquilized wolf after fitting it with a radio collar during collaring operations in Yellowstone National Park May 2003. Higher resolution...

U.S. Fish and Wildlife Service and Oregon Department of Fish and Wildlife biologists monitoring ditch filling. Ditches are filled slowly to pushing any fish downstream out of the construction area. Fish are also captured and relocated when...

This beautiful Elk will be monitored by a special frequency transmitted by the VHF collar around its neck. Data helps us understand migration patterns, mortality rates and habitat use. The USFWS has a long history of working with Native American...

The FWS is currently monitoring the two populations of the Mountain Yellow-Legged frog; the endangered Southern California population found in California and Nevada and all the mountain yellow-legged frogs that occur north of the Tehachapi...